/reproducer-webpack-runtime-unrelated-changes

Primary LanguageJavaScript

Setup

  1. Install dependencies yarn install

  2. Execute Webpack:

yarn webpack
diff -u -r dist1 dist2/

This will result in a difference in entry2.js:

diff -u -r dist1/entry2.js dist2/entry2.js
--- dist1/entry2.js	2018-11-28 12:24:40.000000000 -0500
+++ dist2/entry2.js	2018-11-28 12:24:40.000000000 -0500
@@ -1 +1 @@
-(window.webpackJsonp=window.webpackJsonp||[]).push([[2],[,function(n,o){console.log("entry2")}],[[1,0]]]);
\ No newline at end of file
+(window.webpackJsonp=window.webpackJsonp||[]).push([[3],{2:function(n,o){console.log("entry2")}},[[2,0]]]);
\ No newline at end of file

The critical parts of repeating are:

  1. optimization.runtimeChunk must be set to single
  2. mode must be production
  3. A new entry must be placed between two other entries